The Crandall Stats & Sensors 2390-501-CSS is a pneumatic gradual switch designed for 100% manual adjustment of air pressure within HVAC pneumatic systems. This unit provides precise control over a 0 to 20 psig range, allowing technicians to manually select and maintain specific pressure settings for pneumatic actuators, position-controlled devices, or remote set point adjusters. As a 2390-501-CSS replacement for YMC-1001, it serves as a direct drop-in solution for legacy building automation frameworks, ensuring proportional action relay performance without the need for extensive recalibration or piping modifications. Engineered for durability in commercial environments, this 0/20# manual pneumatic switch features a 300-degree knob rotation for high-resolution pressure scaling. It is typically flush-mounted on control panels, providing a stable output that mimics the functionality of original equipment manufacturers while meeting modern pressure management standards. For contractors maintaining older industrial pneumatic controls, this switch ensures consistent system balancing and reliable manual override capabilities.

Key Benefits

Direct Compatibility: Engineered as the direct replacement for YMC-1001, simplifying field service and reducing downtime.
Precise Pressure Control: Supports a 0/20 psig range with a 300-degree angular rotation for high-accuracy manual tuning.
Robust Construction: Designed for HVACR pneumatic system reliability, maintaining stable output pressure until manually readjusted.
Standard Fitment: Compact industrial design facilitates easy flush-mount installation on standard pneumatic control panels.
Versatile Application: Ideal for managing pneumatic signal lines in dampers, valve actuators, and receiver-controller loops.

Common Questions

Is the 2390-501-CSS a direct swap for the YMC-1001?
Yes, this unit is specifically designed as the direct technical equivalent and physical replacement for the YMC-1001, maintaining all original mounting and performance specifications.

What is the maximum pressure rating for this gradual switch?
The switch is calibrated for a standard pneumatic control range of 0 to 20 psig, making it suitable for most low-pressure air control applications.

Does this switch require an external power source?
No, as a purely pneumatic component, it operates entirely on compressed air signaling and manual mechanical adjustment.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.

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Crandall Stats & Sensors 2390-501-CSS Switch